Observation of fs laser-induced heat dissipation in diamond bulk

Dynamics of refractive index variation in diamond crystal during and after its irradiation by fs laser pulses has been investigated by the pump-probe interferometric technique. It is found that, as well as the positive +Δn variation of refractive index determined by the Kerr effect and the negative...

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Bibliographic Details
Published in:Laser physics letters 2013-03, Vol.10 (3), p.36003
Main Authors: Kononenko, V V, Zavedeev, E V, Latushko, M I, Konov, V I
Format: Article
Language:English
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Summary:Dynamics of refractive index variation in diamond crystal during and after its irradiation by fs laser pulses has been investigated by the pump-probe interferometric technique. It is found that, as well as the positive +Δn variation of refractive index determined by the Kerr effect and the negative −Δn resulting from bulk ionization, there is a positive +Δn determined by material heating. Analysis of experimental data and modeling allows us to visualize a laser heated volume, to trace its growth in time and to determine the temperature of material in the beam waist. The maximum observed temperature for intensity 3 × 1012 W cm−2 is estimated as 700 K.
ISSN:1612-2011
1612-202X
DOI:10.1088/1612-2011/10/3/036003